Dr. Prabhunath Prasad Profile

Dr. Prabhunath Prasad

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Proceedings Article | 10 May 2016 Paper

Study of CO2 variability over India using data from satellites

Prabhunath Prasad, Shantanu Rastogi, R. Singh

Proceedings Volume 9876, 98763H (2016) https://doi.org/10.1117/12.2228029

KEYWORDS: Carbon dioxide, Satellites, Carbon, Earth's atmosphere, Carbon monoxide, Gases, Spectral resolution, Atmospheric sensing, Clouds, Spectroscopy

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The concentration levels of CO₂ in Earth's atmosphere have rapidly increased over the last 250 years. The source of CO₂ in the atmosphere is mainly human activity whereas few natural events such as volcanic activity, natural coal fires etc. also contribute to global CO₂. The ground-based measurements provide a strong global constraint on both human and natural CO₂ fluxes into the atmosphere. However the identification and characterization of strongest natural sources and sinks, and to discriminate the human CO₂ emissions from the natural background, more comprehensive measurement network is needed. Such measurements are essential for the formulation of carbon management policies. For both spatial and temporal studies, detailed global measurements can be provided by satellites. The satellite instruments that provide or have provided atmospheric CO₂ information include SCIAMACHY, GOSAT and OCO-2. Alongwith comparative study of SCIAMACHY and GOSAT derived CO₂, analysis of recently obtained OCO-2 data is also performed. The GOSAT derived concentration values are about 1{2% smaller than those obtained from SCIAMACHY. The spatial and temporal variability of CO₂ over the globe as well as over the Indian land boundary is studied. Comparison with the global view NOAA in-situ data and also location specific data is made.

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